Ablaçäo por radiofrequência de taquicardia supraventricular incessante por via anômala de conduçäo retrógrada decremental / Radiofrequency Ablation of Incessant Supraventricular Tachycardia Due to Decremental Retrograde Conduction Via Anomalous Pathways

ABSTRACT

Woman, 46 years-old with incessant supraventricular tachycardia and tachycardiomyopathy. The diagnosis of a concealed retrograde long conduction time accessory pathway was obtained with the delay of the next atrial activation by delivering a ventricular premature beat during His bundle refratoriness. During electrophysiologic investigation the earliest atrial activation was found to be within the coronary sinus ostium. Two 25 watts applications of radiofrequency were followed by the interruption of the incessant supraventricular tachycardia. The patient has remained symptom free without recurrence for 60 days. Radiofrequency was effective for the treatment of this tachycardia